Volta Plate cameras 1927-1931
From the Ica company Zeiss Ikon inherited the Volta camera for the 6,5x9cm/9x12cm/10x15cm plate formats.
The picture above is from the catalog C 292 b, dated October 1928.
Even during its short production/selling time as a Zeiss Ikon camera the Volta changed from Bestellnummer...
The next table lists the original Bestellnummer starting in 1926 next to the newer one, late 1928/early 1929.